期刊
PHYSICAL REVIEW B
卷 87, 期 11, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.87.115106
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资金
- Knut and Alice Wallenberg Foundation
- Swedish Research Council
- European Commission Network SemiSpinNet [PITN-GA-2008-215368]
- European Regional Development Fund through the Innovative Economy Grant [POIG.01.01.02-00-108/09]
- Polish National Science Centre (NCN) [2011/03/B/ST3/02659]
- Swedish Research Council, VR
We study the nature of (001) surface states in Pb0.73Sn0.27Se in the newly discovered topological-crystalline-insulator (TCI) phase as well as the corresponding topologically trivial state above the band-gap-inversion temperature. Our calculations predict not only metallic surface states with a nontrivial chiral spin structure for the TCI case, but also nonmetallic (gapped) surface states with nonzero spin polarization when the system is a normal insulator. For both phases, angle- and spin-resolved photoelectron spectroscopy measurements provide conclusive evidence for the formation of these (001) surface states in Pb0.73Sn0.27Se, as well as for their chiral spin structure. DOI: 10.1103/PhysRevB.87.115106
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